Gas-engine.



G. D. EIGHMIE.

GAS ENGINE.

APPLICATION FILED SEPT. 15, 1910.

1,076,877. Patented 00n.28,1913.

IOLUMBIA PLANDGRAPM Co.. WASHINGTON, 11;. c,

GEORGE D. EIGI M133, F NEU] YORK, N, Y.

GAS-ENGNE.

Application led Eepteniher 15, 191e.

Specification of Lett-ers Pa tent.

i'waten tod Ort. $38, 1913.

Serial No. 5232,'2?.

- tain new and useful l'mprmfements in t'as Engines, ot which thefollowing is a tull, clear, and exact specification, such as will enableothers skilled in the art to which it appertains to malte and use thesaine.

My invention relates particularly to twocyele gas engines of the baseotunpression type, and it has tor its object to secure an effectualscave1if ing}, of the cylinder and the introduction oct the explosivecharge properly in the working chamber Without confusion with the burntgases. This end is attained by a certain novel construction andorganization of the engine, which will tully appear from thisspecification and be particularly pointed out in the claims. l? or thispurpose, reference is now had to the a-ccompanying drawings, which showone einbodiment orf my invention.

ln these drawings :-'li`if,ui:e 1 is a vertical section ot my improvedengine; Fig. i2 is a sectional view taken on the line 2m@ ot Fig. 1,looking in the direction ot the arrow.

ln these drawings, similar' reference chan aoters designate similarparts.

10 indicates the cylinder or working,` chainber"`of the engine, which isextended down ward to torni an inclosed base lil, through which extendsthe crank shaft 12 in the usual manner.

1-l indicates the connectingl rod and 15 the workin g piston ot theengine, which is here shown as ot' the trunk type, adapted to overrun,in top center' position, the admission port 16 and to overrun, inbottoni center po sii-ion, the exhaust ports 17.

To provide tree inlet and outlet of the 4rases and pre-vent wire-drawingand throt-- tiling thereol', the inlet and exhaust port-s 16 and 17 arecaused to extend completely around the cylinder, thus providing1 anextremely large port area, conducive to high speed operation ot theengine. Said ports are surrounded by manifold boxes, 18 and 1), theformer having suitable connection with the source of the explosivemixture and the lat-ter having suitable connection with the means fordisposing oi the exhaust. gases. The piston 15 is toi-ined with a largecentral opening from which extends upwardly a tubular projection 2()which, with its ports 27 is termed a valve. This valve 20 tits snugly ina dome 21 rising' :trono the cylinder head. This dome 21 and valve 20 havo a iding1 tit` and torni a ,das-tight. and air-tight joint betweenthem. The interior ot' the valve 2O has a hollow plug 25 fitting snuglytherein with its upper end somewhat enlarged so as to tit snugly in thedome 21, Whereit is above the valve Q0. The plug' 25 is fixed in placeby a suitable pin or other means 29 and is provided with packing ringsI26 to engage the inner walls oit` the valve E20 so as to maire agas-tight joint with the saine. The lower end of the plug 2:5 iseonical. The cylinder head ot the cylinder 10 is enlarged or bulging, asshown at 28 so as to provide a chamber to receive gas under pressurefrom the crank case 11 through the ports 2'? when the piston. 15 is al;`the lower limit of its inovei'nent.

ln view of the foregoing' descrilition, the operation ot my improvedengine will be readily understood.

A ssuining;` the parte to be as shown in Fig. 1 ot the drawings and thespa-rl: plug or other ionitingl device in condition 'for use, the cycleis as lfollows: The explosive mixture ot air and gas passes through 'theadmission ports 16 into the crank case. he piston 15 is then lowered andthis mixture is tl'lereby compressed. ils soon as the mix-- ture isfully compressed and the piston lo is at the bottoni ot' its movement,the charge. which has just been exploded, escapes through the port-s 17,and the fresh .mixture in the crank ease escapes through the ports 27into the space above the piston 1li and more particularly into theenlarged part 28. This 'fresh gas, by passing; as above de scribed, intothe top ot the cylinder, torce? the spe-nt gases to escape at the bottomthere of through the ports 17, so that the cylinder is ettectuallyscavenged. The piston l5 theo rises and f vompresses the explosivemixture and at the ini-oper time this mixture is exploded, the piston isdriven downwardly and at the end of the stroke the charge is exhaustodthrough the ports 27 and forced out by the incoinii'in f rharge as abovede scribed.

hWhatl claim is:

1. A two-cycle gas engine adapted to have admission and exhaustrespectively at its workingl cylinder ends, a. Working piston with aport through it, a tubular `valve integral with said piston and open atits ends carried by said piston, a housing in which the valve ogerates,a valve box having a conical lower end mounted rigidly in said housing,said valve being adapted to embrace said box in its reciprocatorymovement and said housing being adapted to embrace said valve.

2. A two-cycle gas engine adapted to have admission and exhaustrespectively at its working cylinder ends, a working piston with a portthrough it, a tubular valve integral with said piston and having itsupper end terminating in fingers and a housing in which the valveoperates, a valve box having a conical lower end, said valve beingadapted to have air-tight Connection with said housing and said valvebox during its reeiproeatory movement and to permit admission at thebottom center piston position.

in testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE D. EIGHBIE.

lVitnesses FRED C. MARTIN, V. BARRIRE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

